Math, asked by Anonymous, 7 months ago

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Find the power of a concave lens of focal length 2m

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Answered by Anonymous

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Answered by Anonymous

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$the \: power \: of \: the \: lens,\:P= \frac{1}{f} \\ focal \: length \: of \: concave \: lens \\ \: f = - 2m \\ then \: the \: power \: of \: the \: lens \\ P=-0.5\: dioptre$

The diopter is the unit of measure for the refractive power of a lens. The power of a lens is defined as the reciprocal of its focal length in metres, or $P= \frac{1}{f}$

where P is the power in dioptres and f is the focal length in metres.

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